To install, just copy the dircolors file to your home directory like this:

cp dircolors-8 ~/.dircolors-8
cp dircolors-256 ~/.dircolors-256

In your shell configuration files, add the following:

dircolors=$HOME/.dircolors-$(tput colors)

if [[ -f $dircolors ]]; then
    eval $(dircolors -b $dircolors)
else
    eval $(dircolors)
fi

If you want to contribute, just fork and edit the dircolors.yml file. You can generate a new dircolors file like this:

python dircolors.py